futility: fix segfault when displaying truncated kernels

Also added a test for it.

BUG=none
BRANCH=none
TEST=make runtests

Change-Id: I108c75d114400e664f0ad1f29038a94cb1effd54
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/233037
Reviewed-by: Randall Spangler <rspangler@chromium.org>
2 files changed